Originally Posted by vinniekq2
I dont understand how a crate engine could have worn valve guides?
i think the problem is partially that there is not really an industry standard regarding them term "crate engine". from gm it is going to mean an all new engine. a friend of mine picked up a "crate engine" from a dealer in Iowa for his vortec pickup, totally stock, that was a .060" over block, and cracked heads. it was cheaper than buying one from me, but not cheaper since he ended up doing both.
at any rate, it depends on who you are getting it from. many of the build rebuild houses picked up the trend and started calling any rebuild a crate engine. being no industry standard for the term, its hard to prove they are being misleading or lying.
as had been said already, go with a reputable local shop, because even the all new gm motors can have problems. (look up the 383 threads on here)